(MFC) Compress Bytes to Base64 (or any other encoding)

Compresses bytes to base64 or any other encoding. Also decompress to return the original.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkBinData.h>
#include <CkCompression.h>
#include <CkByteData.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    bool success;

    // First create some binary data to compress.
    CkBinData binData;

    int i;
    for (i = 1; i <= 16; i++) {
        binData.AppendEncoded("000102030405060708090A0B0C0D0E0F","hex");
    }

    CkCompression compress;
    compress.put_Algorithm("deflate");
    compress.put_EncodingMode("base64");

    CkByteData uncompressedBytes;
    success = binData.GetBinary(uncompressedBytes);

    // Compress and return the compressed bytes in base64 format.
    const char *compressedBase64 = compress.compressBytesENC(uncompressedBytes);
    strOut.append("compressed and base64 encoded: ");
    strOut.append(compressedBase64);
    strOut.append("\r\n");

    // Compress and return in hex format:
    compress.put_EncodingMode("hex");
    const char *compressedHex = compress.compressBytesENC(uncompressedBytes);
    strOut.append("compressed and hex encoded: ");
    strOut.append(compressedHex);
    strOut.append("\r\n");

    // Now decompress..
    CkBinData binData2;

    // Decompress the base64..
    compress.put_EncodingMode("base64");
    success = compress.DecompressBytesENC(compressedBase64,uncompressedBytes);
    binData2.AppendBinary(uncompressedBytes);
    // Show the uncompressed bytes in hex format:
    strOut.append(binData2.getEncoded("hex"));
    strOut.append("\r\n");
    strOut.append("--");
    strOut.append("\r\n");

    // Decompress the hex..
    compress.put_EncodingMode("hex");
    success = compress.DecompressBytesENC(compressedHex,uncompressedBytes);
    binData2.Clear();
    binData2.AppendBinary(uncompressedBytes);
    // Show the uncompressed bytes in hex format:
    strOut.append(binData2.getEncoded("hex"));
    strOut.append("\r\n");
    strOut.append("--");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }